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/*
* Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RenderScrollbar_h
#define RenderScrollbar_h
#include "core/rendering/style/RenderStyleConstants.h"
#include "platform/heap/Handle.h"
#include "platform/scroll/Scrollbar.h"
#include "wtf/HashMap.h"
namespace blink {
class LocalFrame;
class Node;
class RenderBox;
class RenderScrollbarPart;
class RenderStyle;
class RenderScrollbar final : public Scrollbar {
#if ENABLE(OILPAN)
USING_PRE_FINALIZER(RenderScrollbar, destroyParts);
#endif
public:
static PassRefPtrWillBeRawPtr<Scrollbar> createCustomScrollbar(ScrollableArea*, ScrollbarOrientation, Node*, LocalFrame* owningFrame = 0);
virtual ~RenderScrollbar();
RenderBox* owningRenderer() const;
IntRect buttonRect(ScrollbarPart);
IntRect trackRect(int startLength, int endLength);
IntRect trackPieceRectWithMargins(ScrollbarPart, const IntRect&);
int minimumThumbLength();
virtual bool isOverlayScrollbar() const override { return false; }
RenderScrollbarPart* getPart(ScrollbarPart partType) { return m_parts.get(partType); }
virtual void trace(Visitor*) override;
protected:
RenderScrollbar(ScrollableArea*, ScrollbarOrientation, Node*, LocalFrame*);
private:
friend class Scrollbar;
virtual void setParent(Widget*) override;
virtual void setEnabled(bool) override;
virtual void setHoveredPart(ScrollbarPart) override;
virtual void setPressedPart(ScrollbarPart) override;
virtual void styleChanged() override;
virtual bool isCustomScrollbar() const override { return true; }
void updateScrollbarParts(bool destroy = false);
PassRefPtr<RenderStyle> getScrollbarPseudoStyle(ScrollbarPart, PseudoId);
void updateScrollbarPart(ScrollbarPart, bool destroy = false);
void destroyParts();
// This Scrollbar(Widget) may outlive the DOM which created it (during tear down),
// so we keep a reference to the Node which caused this custom scrollbar creation.
// This will not create a reference cycle as the Widget tree is owned by our containing
// FrameView which this Node pointer can in no way keep alive. See webkit bug 80610.
RefPtrWillBeMember<Node> m_owner;
RawPtrWillBeMember<LocalFrame> m_owningFrame;
WillBeHeapHashMap<unsigned, RawPtrWillBeMember<RenderScrollbarPart> > m_parts;
};
DEFINE_TYPE_CASTS(RenderScrollbar, ScrollbarThemeClient, scrollbar, scrollbar->isCustomScrollbar(), scrollbar.isCustomScrollbar());
} // namespace blink
#endif // RenderScrollbar_h
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